ScienceDaily: Electromobility makes sense only if car batteries are charged using electricity from renewable energy sources. But the supply of green electricity is not always adequate. An intelligent charging station can help, by adapting the recharging times to suit energy supply and network capacity. Germany aims to have one million electric vehicles — powered by energy from renewable sources -on the road by 2020. And, within ten years, the German environment ministry expects “green electricity” …